1 Institute of Microbiology, Academy of Sciences of the Republic of Uzbekistan, Tashkent, Uzbekistan.
2 Institute of Fundamental and Applied Research, National Research University Tashkent Institute of Irrigation and Agricultural Mechanization Engineers, Tashkent, Uzbekistan.
* Corresponding Author
ORCID Details
H. Karimov: https://orcid.org/0000-0001-7262-1672
D. Rajabova: https://orcid.org/0009-0003-8907-0004
B. Ravshanov: https://orcid.org/0009-0004-2333-7877
N. Azimova: https://orcid.org/0000-0002-5662-8740
International Journal of Science and Research Archive, 2026, 21(02), 124–134
Article DOI: 10.30574/ijsra.2026.21.2.1976
Received on 27 September 2026; revised on 03 November 2026; accepted on 06 November 2026
This study investigated the biochemical and antagonistic properties of thermophilic and thermotolerant bacteria isolated from the Rayim So‘fi hot spring in Kashkadarya Region, Uzbekistan, and cotton rhizosphere soil. Based on their phenotypic characteristics, two isolates were provisionally identified as Geobacillus sp. and Bacillus sp. Both isolates exhibited proteolytic, amylolytic, and catalase activities, whereas no lipolytic activity was detected. In vitro assays demonstrated that the bacterial isolates inhibited the mycelial growth of the phytopathogenic fungi Fusarium oxysporum and Rhizoctonia solani. These findings indicate that the investigated bacterial isolates may represent promising candidates for the development of biological plant protection strategies.
Thermophilic Bacteria, Thermotolerant Bacteria, Geobacillus Sp., Bacillus Sp., Phytopathogenic Fungi, Antagonistic Activity, Biological Control.
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Malika Nazarova, Husniddin Karimov, Dinara Rajabova, Baxtiyor Ravshanov, Abdumalik Xayrullayev and Nodira Azimova. BIOCHEMICAL AND ANTAGONISTIC PROPERTIES OF BACTERIA ISOLATED FROM A HOT SPRING AND THE COTTON RHIZOSPHERE. International Journal of Science and Research Archive, 2026, 21(02), 124–134. Article DOI: https://doi.org/10.30574/ijsra.2026.21.2.1976.
